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You searched for: subject:"THERMAL PROTECTION"
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[texts]Foamglas in Thin Wall and Sandwich Panel Construction - Pittsburgh Corning Corporation
Trade catalog, Text, Illus, Photographs, CCA ID: 89-B2714, ca. 1954, 12 p, 28 cm
Keywords: Glass; Insulation; Division 07; Thermal and Moisture Protection; Thermal Protection
Downloads: 247
[texts]Jerky loads on surface-hardened gears - Rettig, H.
Damage occurs again and again in practice in the form of transmissions with surface hardened gears which break after a very long operating time (explained by seldom occurring jerky loads). Gear drives are frequently exposed to jerky stresses which are greater than their fatigue limit. These stresses are considered in gear calculations, first, by shock factors when the transmission is to be designed as high endurance with regard to overloads and, second, in the form of operating ratios when the d...
Keywords: FOUNDATIONS; THERMAL PROTECTION; THIN PLATES; SPACECRAFT CONSTRUCTION MATERIALS
Downloads: 84
[texts]Intersymbol Interference Investigations Using a 3D Time-Dependent Traveling Wave Tube Model - Kory, Carol L.
For the first time, a time-dependent, physics-based computational model has been used to provide a direct description of the effects of the traveling wave tube amplifier (TWTA) on modulated digital signals. The TWT model comprehensively takes into account the effects of frequency dependent AM/AM and AM/PM conversion; gain and phase ripple; drive-induced oscillations; harmonic generation; intermodulation products; and backward waves...
Keywords: SPACE SHUTTLE BOOSTERS; THERMAL PROTECTION; COATINGS; ALUMINUM; TEST FACILITIES; TESTS
Downloads: 75
[texts]ANALYSIS OF THERMAL-PROTECTION SYSTEMS FOR SPACE-VEHICLE CRYOGENIC-PROPELLANT TANKS - Knoll, R. H.
Analysis of thermal-protection systems for space vehicle cryogenic propellant tanks
Keywords: CRYOGENIC FLUID STORAGE; SPACE VEHICLE; THERMAL PROTECTION; CRYOGENIC ROCKET PROPELLANTS; HEAT TRANSFER; PROPELLANT TANKS; SPACECRAFT; STORAGE TANKS; THERMAL PROTECTION; CRYOGENIC PROPELLANT; PROPELLANT TANK
Downloads: 78
[texts]Protective cooling by a multislot and network-type injection into a turbulent boundary layer - Kutateladze, S. S.
Protective cooling of insulated plane surface by gas injection into turbulent boundary layer of incident flow through slot system
Keywords: COOLING; THERMAL PROTECTION; TURBULENT BOUNDARY LAYER; GAS INJECTION; INJECTION; SLOTS; SURFACE COOLING; THERMAL PROTECTION; TURBULENT BOUNDARY LAYER; GAS INJECTION; SURFACE COOLING
Downloads: 65
[texts]Quantitative Infrared Spectroscopy of Minor Constituents of Earth's Atmosphere - Chackerian, Charles, Jr.
Infrared spectroscopic techniques have become extremely powerful tools for use in achieving a number of observational objectives in understanding and monitoring the health of Earth s atmosphere. Prerequisite to designing appropriate instruments well as to interpreting the observations that monitor the important molecular species, quantitative laboratory spectroscopic measurements must be done. measurements provide (1) line and band intensity values that are needed to establish limits of detectab...
Keywords: X-34 REUSABLE LAUNCH VEHICLE; THERMAL PROTECTION; AEROTHERMODYNAMICS; ABLATIVE MATERIALS; RUDDERS; THERMAL ANALYSIS; NAVIER-STOKES EQUATION
Downloads: 25
[texts]Simulation study of three instrument displays to assist in airplane thrust management - Mc Laughlin, M. D
Simulation study of three instrument displays to assist airplane thrust management
Keywords: BALANCE; THERMAL PROTECTION; HEAT SHIELDING; HEAT TRANSFER; LOADS (FORCES); VACUUM CHAMBERS
Downloads: 59
[texts]An Anomalous External Force on the MAP Spacecraft - Starin, Scott R.
A common theme in discussions of the Microwave Anisotropy Probe (MAP) is the attainment of mission goals for minimal cost. One area of cost savings was a reduction in the fuel budget required. To reach orbit around the L2 notation point of the Earth-Sun system, the MAP spacecraft was guided very close to the Moon, allowing a gravity-assisted trajectory out to L2. In order to property time the lunar swing-by, MAP followed a trajectory of three-and-a-half highly elliptical phasing loops...
Keywords: AEROSPACE VEHICLES; SURVEYS; PROPULSION SYSTEM CONFIGURATIONS; RADIATION PROTECTION; THERMAL PROTECTION; SPACE COMMERCIALIZATION; CARBON NANOTUBES; TECHNOLOGY ASSESSMENT
Downloads: 71
[texts]A heated-wire liquid-water-content instrument and results of initial flight tests in icing conditions - Neel, C. B
No Abstract Available
Keywords: AIRFOILS; DEICERS; ICE FORMATION; PNEUMATIC CONTROL; THERMAL PROTECTION; AERODYNAMIC CHARACTERISTICS; DRAG MEASUREMENT; PRESSURE GRADIENTS; THERMOCOUPLES
Downloads: 73
[texts]Solutions Network Formulation Report. Landsat Data Continuity Mission Simulated Data Products for Bureau of Land Management and Environmental Protection Agency Abandoned Mine Lands Decision Support - Estep, Lelan
Presently, the BLM (Bureau of Land Management) has identified a multitude of abandoned mine sites in primarily Western states for cleanup. These sites are prioritized and appropriate cleanup has been called in to reclaim the sites. The task is great in needing considerable amounts of agency resources. For instance, in Colorado alone there exists an estimated 23,000 abandoned mines. The problem is not limited to Colorado or to the United States...
Keywords: BOUNDARY LAYER TRANSITION; CORRELATION; THERMAL STRESSES; AEROTHERMODYNAMICS; CALIBRATING; LEADING EDGES; TURBULENCE; BOUNDARY LAYERS; THERMAL PROTECTION; PROTUBERANCES
Downloads: 53
[texts]Airborne profiling of ice thickness using a short pulse radar - Vickers, R. S.
The acquisition and interpretation of ice thickness data from a mobile platform has for some time been a goal of the remote sensing community. Such data, once obtainable, is of value in monitoring the changes in ice thickness over large areas, and in mapping the potential hazards to traffic in shipping lanes. Measurements made from a helicopter-borne ice thickness profiler of ice in Lake Superior, Lake St...
Keywords: CARBON DIOXIDE; CRYODEPOSITS; FROST; THERMAL PROTECTION; HELIUM; LIQUID HYDROGEN; PROPELLANT TANKS; THERMAL INSULATION
Downloads: 69
[image]Thermal Protection System - NASA
Visitors to the Future Missions tent learn about the Thermal Protection System (TPS) for the Orion Crew Exploration Vehicle that will take astronaut crews to the International Space Station and will later return humans to the Moon.
Keywords: Thermal Protection System; What -- Orion; What -- International Space Station (ISS); What -- Moon
Downloads: 107
[texts]REENTRY OF SPACE CRAFT TO EARTH ATMOSPHERE - Alexander Bolonkin
Currently reentry of USA Space Shuttles and Command Module of Lunar Ships burns a great deal of fuel to reduce reentry speed because the temperatures are too high for atmospheric braking by conventional fiber parachutes. Recently high-temperature fiber and whiskers have been produced which could be employed in a new control rectangle parachute to create the negative lift force required. Though it is not large, a light parachute decreases Shuttle speed from 8 km/s (Shuttle) and 11 km/s (Apollo Co...
Keywords: Atmospheric reentry; Space Shuttle; thermal protection of space craft; parachute braking
Downloads: 72
[movies]Enabling Exploration - NASA Ames Video Group
An overview of Ames Research Center and its research activities in support of NASA Exploration programs
Keywords: Ames; Ames Research Center; space exploration; technologies; thermal protection; supercomputing; NASA Research Park; intelligent systems
Downloads: 75
[texts]An evaluation of the thermally radiant environs of a man on the lunar surface - Chapman, A. J.
Radiative thermal energy incident effects on pressure-suited man on lunar surface
Keywords: ENVIRONMENTAL ENGINEERING; PROTECTIVE CLOTHING; SOLAR RADIATION; THERMAL ENERGY; LUNAR ENVIRONMENT; RADIATION EFFECTS; RADIATION SHIELDING; THERMAL PROTECTION
Downloads: 92
[texts]The production of gamma rays in the galaxy - NON
Mechanisms of galactic gamma ray production and estimates of production spectra in Milky Way
Keywords: FLAME SPRAYING; HALOGENS; INORGANIC COMPOUNDS; POLYURETHANE FOAM; RESINS; CHEMICAL REACTIONS; THERMAL PROTECTION
Downloads: 100
[texts]Space Station Furnace Facility. Volume 2: Requirements definition and conceptual design study - NON
The Space Station Freedom Furnace (SSFF) Project is divided into two phases: phase 1, a definition study phase, and phase 2, a design and development phase. TBE was awarded a research study entitled, 'Space Station Furnace Facility Requirements Definition and Conceptual Design Study' on June 2, 1989. This report addresses the definition study phase only. Phase 2 is to be complete after completion of phase 1...
Keywords: COMPOSITE MATERIALS; MISSION PLANNING; REUSABLE LAUNCH VEHICLES; THERMAL PROTECTION; FLIGHT TESTS; GROUND TESTS
Downloads: 126
[texts]AURORAS - COLLECTION OF ARTICLES NO. 17 - ISAYEV, S. I., et al
IONOSPHERIC AURORAL MORPHOLOGY, HEIGHT VARIATIONS, AND RELATIONSHIPS TO PLANETARY MAGNETIC DISTURBANCES IN PERIODS OF MINIMUM AND MAXIMUM SOLAR ACTIVITY AT VARYING LATITUDES
Keywords: ANODIC COATINGS; FLAMES; METAL SURFACES; THERMAL PROTECTION; ANODIZING; IRON ALLOYS; TEMPERATURE CONTROL
Downloads: 125
[texts]Automatic recording McLeod gauge Patent - Faeth, P. A
Automatic recording McLeod gage with three electrodes and solenoid valve connection
Keywords: CERAMICS; INSULATION; THERMAL PROTECTION; THERMODYNAMIC PROPERTIES; CHEMICAL REACTIONS; HEAT TRANSFER; PRODUCT DEVELOPMENT
Downloads: 74
[texts]Two Formal Gas Models For Multi-Agent Sweeping and Obstacle Avoidance - Kerr, Wesley
The task addressed here is a dynamic search through a bounded region, while avoiding multiple large obstacles, such as buildings. In the case of limited sensors and communication, maintaining spatial coverage - especially after passing the obstacles - is a challenging problem. Here, we investigate two physics-based approaches to solving this task with multiple simulated mobile robots, one based on artificial forces and the other based on the kinetic theory of gases...
Keywords: COST REDUCTION; ROBOTICS; SOLAR SYSTEM; PAYLOADS; THERMAL PROTECTION; TEMPLATES; CERTIFICATION; MISSION PLANNING; NASA PROGRAMS; QUALIFICATIONS; RISK
Downloads: 96
[texts]Pathway Concepts Experiment for Head-Down Synthetic Vision Displays - Prinzel, Lawrence J., III
Eight 757 commercial airline captains flew 22 approaches using the Reno Sparks 16R Visual Arrival under simulated Category I conditions. Approaches were flown using a head-down synthetic vision display to evaluate four tunnel (''minimal'', ''box'', ''dynamic pathway'', ''dynamic crow s feet'') and three guidance (''ball'', ''tadpole'', ''follow-me aircraft'') concepts and compare their efficacy to a baseline condition (i.e., no tunnel, ball guidance)...
Keywords: AEROTHERMODYNAMICS; X-33 REUSABLE LAUNCH VEHICLE; COMPUTATIONAL FLUID DYNAMICS; THERMAL PROTECTION; INDUSTRIES; THERMAL ANALYSIS
Downloads: 76
[texts]From Abstract to Concrete Norms in Agent Institutions - Grossi, Davide
Norms specifying constraints over institutions are stated in such a form that allows them to regulate a wide range of situations over time without need for modification. To guarantee this stability, the formulation of norms need to abstract from a variety of concrete aspects, which are instead relevant for the actual operationalization of institutions. If agent institutions are to be built, which comply with a set of abstract requirements, how can those requirements be translated in more concret...
Keywords: VIBRATION TESTS; ACCELEROMETERS; THERMAL PROTECTION; TILES; GROUND TESTS; FREQUENCY RESPONSE; COMPOSITE STRUCTURES; DYNAMIC RESPONSE; FREQUENCIES; FOAMS
Downloads: 100
[texts]Decision Support Tool Evaluation Report for General NOAA Oil Modeling Environment(GNOME) Version 2.0 - Spruce, Joseph P.
NASA's Earth Science Applications Directorate evaluated the potential of NASA remote sensing data and modeling products to enhance the General NOAA Oil Modeling Environment (GNOME) decision support tool. NOAA's Office of Response and Restoration (OR&R) Hazardous Materials (HAZMAT) Response Division is interested in enhancing GNOME with near-realtime (NRT) NASA remote sensing products on oceanic winds and ocean circulation...
Keywords: THERMAL PROTECTION; TECHNOLOGY ASSESSMENT; INFLATABLE STRUCTURES; REENTRY VEHICLES; AEROSHELLS; FLIGHT TESTS; SYSTEMS ENGINEERING; STABILITY; RISK
Downloads: 116
[texts]Attitude Representations for Kalman Filtering - Markley, F. Landi
The four-component quaternion has the lowest dimensionality possible for a globally nonsingular attitude representation, it represents the attitude matrix as a homogeneous quadratic function, and its dynamic propagation equation is bilinear in the quaternion and the angular velocity. The quaternion is required to obey a unit norm constraint, though, so Kalman filters often employ a quaternion for the global attitude estimate and a three-component representation for small errors about the estimat...
Keywords: ABLATION; THERMAL PROTECTION; SURFACE ROUGHNESS; BOUNDARY LAYER TRANSITION; LAMINAR BOUNDARY LAYER; NOSE TIPS
Downloads: 230
[texts]Test Report: Direct and Indirect Lightning Effects on Composite Materials - Evans, R. W
Lightning tests were performed on composite materials as a part of an investigation of electromagnetic effects on the materials. Samples were subjected to direct and remote simulated lightning strikes. Samples included various thicknesses of graphite filament reinforced plastic (GFRP), material enhanced by expanded aluminum foil layers, and material with an aluminum honeycomb core. Shielding properties of the material and damage to the sample surfaces and joints were investigated...
Keywords: CARBON-CARBON COMPOSITES; THERMAL CONDUCTIVITY; DATA BASES; THERMAL PROTECTION; HYPERSONIC VEHICLES; HIGH TEMPERATURE ENVIRONMENTS; THICKNESS
Downloads: 292
[texts]Goddard Laboratory for Atmospheric Sciences, collected reprints 1978 - 1979, volume 2 - Skillman, W. C.
Information about the Earth hydrosphere, obtained in the field and from aircraft and satellite imagery is reported. Particular emphasis is given to the use of microwave sensors in the study of soil moisture, sea ice, snow cover and atmospheric parameters associated with watersheds.
Keywords: ARRAYS; TITANIUM; FABRICATION; MANUFACTURING; PANELS; THERMAL PROTECTION; ABLATIVE MATERIALS; ASSEMBLING; HEAT SHIELDING; PRODUCTION MANAGEMENT
Downloads: 319
[texts]A lunar exploration program based upon Saturn-boosted systems - NON
No Abstract Available
Keywords: ABLATION; LEADING EDGES; SPACE SHUTTLES; THERMAL PROTECTION; AERODYNAMIC HEATING; HEAT TRANSFER; TEMPERATURE CONTROL
Downloads: 296
[texts]Fundamental Mixing and Combustion Experiments for Propelled Hypersonic Flight - Cutler, A. D.
Two experiments have been conducted to acquire data for the validation of computational fluid dynamics (CFD) codes used in the design of supersonic combustors. The first experiment is a study of a supersonic coaxial jet into stagnant air in which the center jet is of a light gas, the coflow jet is of air, and the mixing layer between them is compressible. The jet flow field is characterized using schlieren imaging, surveys with Pitot, total temperature and gas sampling probes, and RELIEF velocim...
Keywords: HEAT FLUX; LAUNCH VEHICLES; CONVECTIVE HEAT TRANSFER; THERMAL PROTECTION; CALORIMETERS; CONDUCTIVE HEAT TRANSFER
Downloads: 91
[texts]Average sedimentary rock rare Earth element patterns and crustal evolution: Some observations and implications from the 3800 Ma ISUA supracrustal belt, West Greenland - Dymek, R. F.
Rare earth element (REE) data is given on a set of clastic metasediments from the 3800 Ma Isua Supracrustal belt, West Greenland. Each of two units from the same sedimentary sequence has a distinctive REE pattern, but the average of these rocks bears a very strong resemblance to the REE pattern for the North American Shale Composite (NASC), and departs considerably from previous estimates of REE patterns in Archaean sediments...
Keywords: INTERNAL FLOW; SPACE SHUTTLES; STEADY FLOW; THERMAL PROTECTION; CHANNEL FLOW; INCOMPRESSIBLE FLOW; POROUS MATERIALS
Downloads: 104
[texts]Upward Flame Spread Over Thin Solids in Partial Gravity - Feier, I. I.
The effects of partial-gravity, reduced pressure, and sample width on upward flame spread over a thin cellulose fuel were studied experimentally and the results were compared to a numerical flame spread simulation. Fuel samples 1-cm, 2-cm, and 4-cm wide were burned in air at reduced pressures of 0.2 to 0.4 atmospheres in simulated gravity environments of 0.1-G, 0.16-G (Lunar), and 0.38-G (Martian) onboard the NASA KC-135 aircraft and in normal-gravity tests...
Keywords: AERODYNAMIC HEATING; COMPUTER PROGRAMS; THERMAL PROTECTION; REUSABLE LAUNCH VEHICLES; NUMERICAL ANALYSIS
Downloads: 78
[texts]ELECTRICITY OF CLOUDS - IMYANITOV, I. M.
RECENT STUDIES OF THE ELECTRICAL STRUCTURE OF CLOUDS, PROCESSES LEADING TO THEIR ELECTRIFICATION, AND THE POSSIBILITY OF CONTROLLING THEIR FORMATION BY ELECTRICAL MEANS ARE REVIEWED. THE ELECTRICAL PROPERTIES OF STRATIFORM CLOUDS, CONVECTIVE CLOUDS WITHOUT RAIN, AND CUMULONIMBUS CLOUDS ARE DESCRIBED. THE ELECTRIFICATION OF PARTICLES IN CLOUDS AND PRECIPITATION, ACCUMULATION OF SPACE CHARGES IN CLOUDS, AND THE INFLUENCE OF THE ELECTRICAL CHARACTERISTICS OF A CLOUD ON ITS DEVELOPMENT ARE CONSIDERE...
Keywords: AIRFRAME MATERIALS; COMPOSITE MATERIALS; FIBERS; THERMAL PROTECTION; ATMOSPHERIC ENTRY; SPACECRAFT DESIGN
Downloads: 190
[texts]Unmanned mssr entry into mars during the 1975 manned twilight flyby - Cassidy, D. E
No Abstract Available
Keywords: GLASS; REUSABLE HEAT SHIELDING; SPACE SHUTTLES; THERMAL INSULATION; SIMULATION; SPACECRAFT LAUNCHING; THERMAL CYCLING TESTS; THERMAL PROTECTION
Downloads: 81
[texts]Space Station Furnace Facility. Experiment/Facility Requirements Document (E/FRD), volume 2, appendix 5 - Kephart, Nanc
The function of the Space Station Furnace Facility (SSFF) is to support materials research into the crystal growth and solidification processes of electronic and photonic materials, metals and alloys, and glasses and ceramics. To support this broad base of research requirements, the SSFF will employ a variety of furnace modules operated, regulated, and supported by a core of common subsystems. Furnace modules may be reconfigured or specifically developed to provide unique solidifcation condition...
Keywords: DURABILITY; PLANFORMS; QUALITY CONTROL; MANUFACTURING; SPACE TRANSPORTATION; THERMAL INSULATION; THERMAL PROTECTION; BONDING; COATING; HEATING; ISOLATION
Downloads: 352
[texts]Detectors for optical communications: A review - Katz, J
Detectors for optical communications in the visible and near infrared regions of the spectrum are reviewed. The three generic types of detectors described are: photomultipliers, photodiodes and avalanche photodiodes. Most of the information is applicable to other optical communications systems.
Keywords: AEROTHERMODYNAMICS; HYPERSONIC FLOW; THERMAL PROTECTION; COMPUTER PROGRAMS; INPUT; USER MANUALS (COMPUTER PROGRAMS)
Downloads: 66
[texts]Crash-Energy Absorbing Composite Structure and Method of Fabrication - NON
A stand-alone, crash-energy absorbing structure and fabrication method are provided. A plurality of adjoining rigid cells are each constructed of resin-cured fiber reinforcement and are arranged in a geometric configuration. The fiber reinforcement can be in the form of a fabric or braided fibers wrapped about a core that is either left in place or removed from the ultimate cured structure. The geometric configuration of cells is held together with more fiber reinforcement (in the form of fabric...
Keywords: HYPERSONIC VEHICLES; WALLS; AERODYNAMIC HEATING; THERMAL PROTECTION; BOUNDARY LAYERS; CATALYSIS; COMPUTATIONAL FLUID DYNAMICS; NAVIER-STOKES EQUATION; STAGNATION POINT; FLOW DISTRIBUTION
Downloads: 57
[texts]ACTS mobile propagation campaign - Goldhirsh, Julius
Preliminary results are presented for three propagation measurement campaigns involving a mobile receiving laboratory and 20 GHz transmissions from the Advanced Communications Technology Satellite (ACTS). Four 1994 campaigns were executed during weekly periods in and around Austin, Texas in February and May, in Central Maryland during March, and in Fairbanks, Alaska and environs in June. Measurements tested the following effects at 20 GHz: (1) attenuation due to roadside trees with and without f...
Keywords: CLEAN ROOMS; CONTROLLED ATMOSPHERES; OPTICAL EQUIPMENT; SAMPLING; THERMAL PROTECTION; CLEANLINESS; CONTAMINATION; FABRICATION; HUBBLE SPACE TELESCOPE; PROVING; SHROUDS; SIMULATORS; ASTRONAUT TRAINING
Downloads: 54
[movies]NASA Connect - XPG - X-Plane, Ratios, and TPS - NASA LaRC Office of Education
NASA Connect segment explaining the X-Plane, scale model, and Venture Star. The video also explores a Thermal Protection System, or TPS and gives examples of this.
Keywords: NASA Connect; Velocity; Speed of Sound; Launch Vehicle; Thermal Protection System; Spacecraft; Atmosphere; X-33; Ratio; Scale; Model; Revolutions
Downloads: 75
[texts]Product Distribution Theory and Semi-Coordinate Transformations - Airiau, Stephane
Product Distribution (PD) theory is a new framework for doing distributed adaptive control of a multiagent system (MAS). We introduce the technique of ''coordinate transformations'' in PD theory gradient descent. These transformations selectively couple a few agents with each other into ''meta-agents''. Intuitively, this can be viewed as a generalization of forming binding contracts between those agents...
Keywords: AEROTHERMODYNAMICS; PROTUBERANCES; THERMAL PROTECTION; CONSTRUCTION; ELEVONS; HEAT TRANSFER; X-33 REUSABLE LAUNCH VEHICLE; ACTUATORS; CONTROL SURFACES; DEFLECTION; FLOW DISTRIBUTION
Downloads: 55
[texts]Capture and Delivery of Asteroid to the Earth - Alexander Bolonkin
Authors offer the new method for deliver the asteroid to Earth. That method is cheaper in a lot of times than a conventional method. In our method for braking apparatus and asteroid are used the kinetic energy of apparatus. This energy is used also for charging the apparatus energy storage. The small control parachute allows multiple using the Earth atmosphere for the braking the asteroid without high heating, deliver the asteroid in given point and to avoid the asteroid impact to Earth...
Keywords: Asteroid delivery to Earth; Atmospheric reentry; Space Ships; thermal protection of asteroid and space apparatus; parachute braking
Downloads: 24
[texts]Scientific investigations of atmospheric processes - Perkey, Donald J
This contract involved research in atmospheric dynamical and thermodynamical processes to develop procedures for combining generalized radiative transfer codes with dynamic atmospheric model codes to perform diagnostic analysis of atmospheric processes to gain better understanding of the evolution and development of mesoscale circulation systems and their precipitation structures, and to develop algorithms and software necessary to graphically display diagnostic sets on the MSFC McIDAS and EADS ...
Keywords: APOLLO SPACECRAFT; ENVIRONMENTAL TESTS; REENTRY EFFECTS; THERMAL PROTECTION; ABLATION; CHEMICAL PROPERTIES; MECHANICAL PROPERTIES; SPACE ENVIRONMENT SIMULATION; THERMAL SIMULATION
Downloads: 79
[texts]Bounding solutions of geometrically nonlinear viscoelastic problems - Stubstad, J. M.
Integral transform techniques, such as the Laplace transform, provide simple and direct methods for solving viscoelastic problems formulated within a context of linear material response and using linear measures for deformation. Application of the transform operator reduces the governing linear integro-differential equations to a set of algebraic relations between the transforms of the unknown functions, the viscoelastic operators, and the initial and boundary conditions...
Keywords: AFTERBODIES; TEST FACILITIES; THERMOCOUPLES; COMPOSITE MATERIALS; CORK (MATERIALS); SKIRTS; SPACE SHUTTLE BOOSTERS; THERMAL PROTECTION; ALUMINUM; EPOXY COMPOUNDS; LEAST SQUARES METHOD
Downloads: 89
[texts]Dynamic Moire methods for detection of loosened space shuttle tiles - Snow, W. L.
Moire fringe methods for detecting loose space shuttle tiles were investigated with a test panel consisting of a loose tile surrounded by four securely bonded tiles. The test panel was excited from 20 to 150 Hz with in-plane sinusoidal acceleration of 2 g (peak). If the shuttle orbiter can be subjected to periodic excitation of 1 to 2 g (peak) and rigid-body periodic displacements do not mask the change in the Moire pattern due to tile looseness, then the use of projected Moire fringes to detect...
Keywords: DYNAMIC RESPONSE; REUSABLE HEAT SHIELDING; NONLINEAR SYSTEMS; SPACE SHUTTLE ORBITERS; THERMAL PROTECTION; TILES; ABLATIVE MATERIALS; CONTROL EQUIPMENT; PARAMETERIZATION; REENTRY SHIELDING
Downloads: 77
[texts]OTV fluid mangement systems - Hastings, L
Design, performance, and technology issues associated with reduced gravity propellant management for orbital transfer vehicles (OTV's) are reviewed. The in-space cryogenic management state-of-technology significantly affects the overall confidence level associated with a resupply mission and propulsion performance. Cryogen resupply sequences, timelines, controls, and associated crew involvement are all affected by the technology state...
Keywords: AEROASSIST; GUIDANCE (MOTION); THERMAL PROTECTION; LIFT DRAG RATIO; ORBIT TRANSFER VEHICLES; TECHNOLOGY ASSESSMENT; AEROBRAKING; AERODYNAMICS; AEROMANEUVERING; COST EFFECTIVENESS; DATA BASES
Downloads: 76
[texts]Large-area silicon sheet task - Morrison, A. D
A set of computer models was used to define a growth system configuration that was then built and used to grow web with lower thermally generated stress. Aspects of research in the edge-defined film-fed growth (EFG) method of making Si ribbon are reported. A technique was developed to determine base resistivity and carrier lifetime in semicrystalline wafers. Automated growth of 150 kg of 15 cm-dia ingot material per crucible is reviewed...
Keywords: SPACE SHUTTLE ORBITERS; TAIL ASSEMBLIES; THERMAL PROTECTION; TILES; WIND TUNNEL TESTS; ASCENT TRAJECTORIES; PRELAUNCH TESTS; REENTRY SHIELDING; TABLES (DATA)
Downloads: 81
[texts]Development of a Fatigue Crack Growth Coupon for Highly Plastic Stress Conditions - Allen, Phillip A.
The analytical approach used to develop a novel fatigue crack growth coupon for highly plastic stress field condition is presented in this paper. The flight hardware investigated is a large separation bolt that has a deep notch, which produces a large plastic zone at the notch root when highly loaded. Four test specimen configurations are analyzed in an attempt to match the elastic-plastic stress field and crack constraint conditions present in the separation bolt...
Keywords: EXTERNAL TANKS; SURFACE VEHICLES; WIND TUNNELS; LIQUID OXYGEN; PAYLOADS; PODS (EXTERNAL STORES); THERMAL PROTECTION; FINS; LANDING GEAR; PROPELLANTS; PROPULSION
Downloads: 58
[texts]Variational Methods in Sensitivity Analysis and Optimization for Aerodynamic Applications - Ibrahim, A. H.
Variational methods (VM) sensitivity analysis, which is the continuous alternative to the discrete sensitivity analysis, is employed to derive the costate (adjoint) equations, the transversality conditions, and the functional sensitivity derivatives. In the derivation of the sensitivity equations, the variational methods use the generalized calculus of variations, in which the variable boundary is considered as the design function...
Keywords: THERMAL PROTECTION; TOLERANCES (MECHANICS); THERMAL SHOCK; SHOCK RESISTANCE; THERMAL STABILITY; CERAMICS; PROTECTIVE COATINGS; HIGH TEMPERATURE; CARBON-CARBON COMPOSITES; REFRACTORY MATERIALS
Downloads: 91
[texts]Report of the NASA Workshop on Global Wind Measurements - NON
A summary of the workshop is presented. In the workshop the objectives were as follow: to review the requirements for wind measurements for the various atmospheric scales; to determine the capabilities and shortcomings of the current wind observing systems; to appraise each potential new wind observing system; and to establish requirements for future research and development. The papers presented addressed the following: the meteorological uses and requirements for wind measurements; the various...
Keywords: BOOSTER ROCKET ENGINES; CURTAINS; ROCKET ENGINE DESIGN; SOLID PROPELLANT ROCKET ENGINES; THERMAL ANALYSIS; THERMAL PROTECTION; THERMODYNAMIC PROPERTIES; COMPUTER TECHNIQUES; ESTIMATING
Downloads: 106
[texts]Optical module for the integrated real-time contamination monitor - Wrench, E. H
The concept of a real time contamination monitor is studied and the evolution of the optical module component from laboratory model through the engineering evaluation model is reported. Mechanisms employed and problems experienced are described. Current efforts are directed toward a major simplification of design in a unit intended for flight.
Keywords: ACTUATORS; LOUVERS; PERFORMANCE TESTS; SPIRALS (CONCENTRATORS); STRUCTURAL DESIGN; BOURDON TUBES; MECHANICAL DRIVES; SATELLITE-BORNE INSTRUMENTS; THERMAL PROTECTION
Downloads: 68
[texts]Preliminary performance and interface specification ground operational support system Project Apollo spacecraft /U/ - NON
No Abstract Available
Keywords: APOLLO PROJECT; SPACECRAFT INSTRUMENTS; SPACECRAFT GUIDANCE; SPACECRAFT PROPULSION; THERMAL PROTECTION; TRAJECTORY ANALYSIS; CONFERENCES; HUMAN FACTORS ENGINEERING; SPACECRAFT COMMUNICATION; SPACECRAFT CONFIGURATIONS
Downloads: 75
[texts]Cars Thermometry in a Supersonic Combustor for CFD Code Validation - Cutler, A. D.
An experiment has been conducted to acquire data for the validation of computational fluid dynamics (CFD) codes used in the design of supersonic combustors. The primary measurement technique is coherent anti-Stokes Raman spectroscopy (CARS), although surface pressures and temperatures have also been acquired. Modern- design- of-experiment techniques have been used to maximize the quality of the data set (for the given level of effort) and minimize systematic errors...
Keywords: FABRICATION; PANELS; THERMAL PROTECTION; CRYOGENIC FLUID STORAGE; CREEP ANALYSIS; LOADS (FORCES); REUSABLE LAUNCH VEHICLES; FINITE ELEMENT METHOD
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